Qualitative Analysis of Cations

Why is Pb+2 kept in both Gr1 and Gr2?

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996
Swarna Kamal Dhyawala ·

because it reacts with chloride ions giving white precipitate of PbCl2
Pb2+ + 2Cl- ---> PbCl2
and reacts with H2S giving black PbS
Pb2+ + S2----> 2PbS

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